Well, yes, except that he also seems to not have sons, so that'd just be putting off the problem for a few years. As long as they're looking at a female descendant, they may as well look at Princess Aiko as the daughters of Prince Tomihito.

Princess Akiko and Yoko are now 23 and 21 yeas old,and
thier parents are Prince Tomohito and Princess Nobuko.
Princess Akiko was born on 20 December 1981.
Currently studying at the Oxford University again after graduating the Gakushuin University Tokyo.
Princess Yoko wasi born on 25 October 1983.
Currently studying at the Gakushuin Women's College.

2~4.Princess Akiko left Japan to study at Oxford College.(2001-9-1)
5.She temporarily returned home to Japan and held the press conference to the coming of age commemoration. (2001-12-19)
6~9.With Takuma Sato,who is famous F1driver(2002)

1~3.Princess Akiko At the garden party(2002-10-31)
4~5.Princess Yoko held the press conference to the coming of age commemoration.(2003-10-23)
6.Princess Akiko and Yoko at the garden party.It was the first public duty for Princess Yoko.(2003-10-30)
7.Princess Akiko (2004-1-25)
8and9.At the garden party(2004-4-15)
10.Princess Yoko

1.Prince Naruhito ,Princess Masako and Princess Aiko went to Nagano.(2005-2-14)
Crown Princess to make 1st official visit outside Tokyo in 15 months
Crown Princess Masako is set to visit Nagano Prefecture in late February to attend the Special Olympics, her first official duty outside Tokyo in nearly 15 months, the Imperial Household Agency said Monday.

Crown Prince Naruhito and Crown Princess Masako who is recovering from a stress-induced illness, will arrive in Nagano Prefecture on Feb. 26, the day the Special Olympics is scheduled to begin.

The Crown Prince will attend the opening ceremony of the Special Olympics, an international sports event primarily for mentally disabled people, while his wife is expected to refrain from being present to avoid unnecessary burden on her schedule. However, the following day she will view a match of floor hockey, a game similar to ice hockey, with her husband.

The Imperial Household Agency deemed that Princess Masako can attend the event after consulting her doctors.

Crown Princess Masako put her official duties on hold after being admitted to hospital in December 2003 to be treated for shingles. In July last year, it was announced that she had suffered from an adjustment disorder.

Crown Prince Naruhito surprised the Japanese public by lashing out at the Imperial Household Agency at a news conference in early May over the poor health of his wife.

"There were moves to deny Masako's career and personality," the Crown Prince said in what was probably the most forthright condemnation an Imperial Family member has made of the agency.

He subsequently issued a statement through the agency in an apparent bid to smooth over the ripples his remarks had caused in Japanese society.

The Princess has recovered considerably from the illness, and joined Emperor Akihito and other Imperial Family members in greeting well-wishers from the Imperial Palace balcony on Jan. 2 this year. It was the first time that she had performed an official duty in 13 months.

Her upcoming visit to Nagano represents her first official duty outside Tokyo since she attended a national athletic meet for handicapped people held in Shizuoka Prefecture in November 2003.

Hopes for the recovery of Japan's Crown Princess Masako were dealt a blow at the weekend after she cancelled a public appearance. The 41-year-old, who has been struggling with emotional difficulties for over a year, had been expected to attend the Special Olympics Winter Games in Nagano.

She cancelled the engagement just a day in advance, however. "It was unfortunate that I cannot go," said the princess. "I am sorry to trouble so many people." Her visit to the mountain city, where she spent a six-day break with her family just last month, was to be her first official trip outside Tokyo since November 2003.

The Imperial Household Agency has confirmed that ill-health was the reason for her cancellation, describing the royal's condition as "inappropriate" for attendance. The princess has been struggling with what minders describe as an "adjustment disorder" for the last 14 months.

Royal experts say the main source of her difficulties has been the intense pressure to provide a male heir. Plans for a constitutional amendment clearing the way for her daughter Aiko to accede to the throne are expected to get the green light, but it seems Masako is still not quite ready to return to public life.